Efficient multi-keV x-ray source generated by nanosecond laser pulse irradiated multi-layer thin foils target

A new target configuration is proposed to generate efficient multi-keV x-ray source using multiple thin foils as x-ray emitters. The target was constructed with several layers of thin foils, which were placed with a specific, optimized spacing. The thin foils are burned though one by one by a nanose...

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Bibliographic Details
Published in:Physics of plasmas 2014-04, Vol.21 (4)
Main Authors: Tu, Shao-yong, Hu, Guang-yue, Miao, Wen-yong, Zhao, Bin, Zheng, Jian, Yuan, Yong-teng, Zhan, Xia-yu, Hou, Li-fei, Jiang, Shao-en, Ding, Yong-kun
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Density
Emission
Emitters
FABRICATION
FOAMS
FOILS
KEV RANGE
Laser beam heating
LASER-RADIATION HEATING
LASERS
LAYERS
Multilayers
PLASMA
Plasma physics
PULSES
SIMULATION
Thickness
Thin films
X RADIATION
X ray sources
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Summary:A new target configuration is proposed to generate efficient multi-keV x-ray source using multiple thin foils as x-ray emitters. The target was constructed with several layers of thin foils, which were placed with a specific, optimized spacing. The thin foils are burned though one by one by a nanosecond-long laser pulse, which produced a very large, hot, underdense plasma. One-dimensional radiation hydrodynamic simulations show that the emission region and the multi-keV x-ray flux generated by multi-layer thin foil target are similar to that of the low-density gas or foam target, which is currently a bright multi-keV x-ray source generated by laser heating. Detailed analysis of a range of foil thicknesses showed that a layer-thickness of 0.1 μm is thin enough to generate an efficient multi-keV x-ray source. Additionally, this type of target can be easily manufactured, compared with the complex techniques for fabrication of low-density foam targets. Our preliminary experimental results also verified that the size of multi-keV x-ray emission region could be enhanced significantly by using a multi-layer Ti thin foil target.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4871730